Published June 27, 2014 | Version v1
Journal article Metadata-only

Geometrical scaling of direct-photon production in hadron collisions from RHIC to the LHC

Creators

  • 1. ExtreMe Matter Institute, GSI, Darmstadt (Germany)
  • 2. Institut für Kernphysik, Münster (Germany)
  • 3. Physics Department, China Central Normal University, Wuhan (China)
  • 4. RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, NY 11973 (United States)
  • 5. Physics Department, Bdg. 510A, Brookhaven National Laboratory, Upton, NY 11973 (United States)

Description

Geometric scaling is a property of hadronic interactions predicted by theories of gluon saturation and expressing rates in terms of dimensionless ratios of transverse momentum to the saturation momentum. In this paper we consider production of photons in pp, dAu and AuAu collisions at √(sNN)=200 GeV (RHIC) and in PbPb collisions at √(sNN)=2760 GeV (LHC) and show that the yield of direct photons in the transverse momentum range 1 GeVT≤4 GeV/c satisfies geometric scaling. Excellent agreement with geometric scaling is obtained with the only free parameter of the saturation momentum determined previously via the dependence of the saturation momentum upon Bjorken x and centrality

Availability note (English)

Available from http://dx.doi.org/10.1016/j.physletb.2014.05.063

Additional details

Identifiers

DOI
10.1016/j.physletb.2014.05.063;
arXiv
arXiv:1403.1174v2;
PII
S0370-2693(14)00373-6;

Publishing Information

Journal Title
Physics Letters. Section B
Journal Volume
734
Journal Issue
Complete
Journal Page Range
p. 282-285
ISSN
0370-2693
CODEN
PYLBAJ

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47005835
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S43: PARTICLE ACCELERATORS;
Descriptors DEI
ATOM-ATOM COLLISIONS; BROOKHAVEN RHIC; CERN LHC; GEOMETRY; GEV RANGE; GLUONS; GOLD; HADRONS; LEAD; PARTICLE PRODUCTION; PHOTONS; PROTON-PROTON INTERACTIONS; SATURATION; SCALING; TRANSVERSE MOMENTUM
Descriptors DEC
ACCELERATORS; ATOM COLLISIONS; BARYON-BARYON INTERACTIONS; BOSONS; COLLISIONS; CYCLIC ACCELERATORS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; HADRON-HADRON INTERACTIONS; HEAVY ION ACCELERATORS; INTERACTIONS; LINEAR MOMENTUM; MASSLESS PARTICLES; MATHEMATICS; METALS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PROTON-NUCLEON INTERACTIONS; STORAGE RINGS; SYNCHROTRONS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.